Convenient inflation and deflation: Inflate easily with an oral inflator or standard BC hose, and deflate quickly through the integrated dump valve for compact, readytostore after use. Wearresistant construction: Made from 210D Nylon Fabric with an overpressure valve to prevent rupturing during ascent, delivering durability and reliability in varied conditions. Essential safety tool for divers: The Marker Buoy (SMB) helps signal your presence to boats, enhancing safety during underwater activities. Applications and compatibility: Ideal for scuba diving, snorkeling, and spearfishing. Designed for both amateur and experienced divers. Compatible with oral inflators and standard BC hoses for flexible filling options. Use scenarios: 1) On a boat with surface traffic, deploy the SMB to increase visibility and signal your location during ascent. 2) While spearfishing or exploring underwater, inflate the SMB before surfacing to mark your position for teammates. 3) During snorkeling trips, use the SMB as a floating marker to locate your group or signal your to the surface.